The Mortal Instruments and anything related belongs to Cassandra Clare.
As he passed each body, not seeing the man he was looking for, the tight ball of tension inside his chest eased just a little more. The only thing running through his head was his mantra of No, no, no, please, not him, no repeating over and over.
Magnus was almost certain he wasn't there when—
"No," he choked out, falling to his knees beside the body. "No, please, it's not fair. Alec, darling, please, please wake up." But even as he said it, he knew it couldn't ever happen. His sun had been swallowed by darkness.
"I didn't even get to tell you that I still love you," he sobbed. "Alec, I do, I still love you. I was so stupid, darling, I should have never let you go. I should have come with you when you told me you were coming out here. I would have been able to keep you safe. You wouldn't be—" he broke off, unable to say the word. It was too horrible to know that Alec, his pillar of strength, his light in the dark, his world, was . . . Was gone.
"I can't Alec." Magnus had passed sadness now, the only feeling inside him being crushing despair. "I know I promised you that I would go on if anything ever happened to you. But I can't Alec. I told you that I would follow you anywhere. I will keep my promise." With that, he picked up a blade, noting dimly that it wasn't Alec's. Good, he thought, he wouldn't want his blade to be the one to have killed me.
As he slit his wrists, watching his life's blood seep out in macabre fascination, there was an odd felling of . . . relief in him, a sense of I'm going to be with Alec, somewhere where no one can get in our way. And as he died, he slumped over Alec's chest, and Magnus was happy.
That was how Isabelle found them, in the middle of a massacre site, Magnus on top of Alec. Immediately, her thoughts went to denial.
It's not them. They're strong, they wouldn't have died. But as she continued to dismiss what her eyes were telling her, she knew they were right. Alec and Magnus were dead.
"Jace," she called out, voice oddly calm. "You might want to see this."
While her only remaining brother jogged over, Izzy saw a splash of water hit the dirt by her feet, and realized she was crying. This, she vowed to herself, is the last time I'm going to cry. After this, no more tears. That was when she felt Jace stop beside her, draw in a sharp breath, and start shaking.
And so they stood like that for a long time, the two remaining Lightwoods, and stared at the bodies of the men who were family, one of whom wasn't supposed to die before they were long gone. Slowly, they both came to the same conclusion:
It's up to us to carry on the Lightwood name, and pass on the legacies of the Lightwood family. There's no one but us left.